/**
 * @swagger
 * /api/endpoint/deleteamywatchedcases_api:
 *   delete:
 *     tags: [Portal,Case]
 *     summary: Phase 2
 *     description: Delete my watched cases
 *     responses:
 *       200:
 *         description: Success
 */

import axios from "axios";
import { getServerSession } from "next-auth/next";
import { azureHeaders } from "../../../actions/core/headers";
import { escapeODataString } from "../../../actions/core/guards";
import { consoleLogger } from "../../../actions/core/logger";
import { getToken } from "../../../actions/core/token";
import { hashAPIPath } from "../../../actions/core/hash";
import { authOptions } from "../auth/[...nextauth]";
import { respondError, respondSuccess } from "../middleware/apiResponse";
import { relayGetData } from "../middleware/relayForwarding";

const WEBAPI_URL =
    process.env.RELAY_ROOT ||
    "https://dev-pedw-ns.servicebus.windows.net/dev-pedw-hc/";

const GUID_PATTERN =
    /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;

const normaliseGuid = (value) => value.trim().toLowerCase();

export default async function ApiProxy(req, res) {
    const watchedCaseID = req.query.watchedCaseID;

    if (
        typeof watchedCaseID !== "string" ||
        !GUID_PATTERN.test(watchedCaseID)
    ) {
        return respondError(res, {
            status: 400,
            code: "INVALID_WATCHED_CASE_ID",
            message: "watchedCaseID must be a valid GUID"
        });
    }

    if (req.method !== "DELETE") {
        return respondError(res, {
            status: 405,
            code: "METHOD_NOT_ALLOWED",
            message: "Only DELETE is supported"
        });
    }

    const session = await getServerSession(req, res, authOptions(req, res));
    const authenticatedEmail = session?.user?.email;

    if (
        typeof authenticatedEmail !== "string" ||
        authenticatedEmail.trim().length === 0
    ) {
        return respondError(res, {
            status: 401,
            code: "UNAUTHENTICATED",
            message: "Authentication required"
        });
    }

    try {
        const token = await getToken();
        const requestOptionsBuilder = (accessToken) => azureHeaders(accessToken);
        const escapedEmail = escapeODataString(authenticatedEmail);
        const contactQueryUrl =
            "contacts?$filter=emailaddress1 eq '" +
            escapedEmail +
            "' and statuscode eq 1&$select=contactid";
        const contactResponse = await relayGetData({
            queryUrl: contactQueryUrl,
            accessToken: token.access_token,
            requestOptionsBuilder
        });
        const contacts = contactResponse?.data?.value;

        if (!Array.isArray(contacts)) {
            return respondError(res, {
                status: 500,
                code: "CONTACT_LOOKUP_FAILED",
                message: "Unable to verify portal contact"
            });
        }

        if (
            contacts.length !== 1 ||
            typeof contacts[0]?.contactid !== "string" ||
            !GUID_PATTERN.test(contacts[0].contactid.trim())
        ) {
            return respondError(res, {
                status: 403,
                code: "CONTACT_IDENTITY_NOT_RESOLVED",
                message: "Request not permitted"
            });
        }

        const normalisedWatchedCaseID = normaliseGuid(watchedCaseID);
        const watchlistQueryUrl =
            "pinswg_watchlists(" +
            normalisedWatchedCaseID +
            ")?$select=pinswg_watchlistid,_pinswg_contact_value";
        let watchlistResponse;

        try {
            watchlistResponse = await relayGetData({
                queryUrl: watchlistQueryUrl,
                accessToken: token.access_token,
                requestOptionsBuilder
            });
        } catch (error) {
            if (error?.response?.status === 404) {
                return respondError(res, {
                    status: 404,
                    code: "WATCHED_CASE_NOT_FOUND",
                    message: "Watched case not found"
                });
            }

            throw error;
        }

        const watchlist = watchlistResponse?.data;
        const watchlistContactID = watchlist?._pinswg_contact_value;
        const watchlistRecordID = watchlist?.pinswg_watchlistid;

        if (
            typeof watchlistRecordID !== "string" ||
            !GUID_PATTERN.test(watchlistRecordID.trim()) ||
            normaliseGuid(watchlistRecordID) !== normalisedWatchedCaseID ||
            typeof watchlistContactID !== "string" ||
            !GUID_PATTERN.test(watchlistContactID.trim()) ||
            normaliseGuid(watchlistContactID) !==
                normaliseGuid(contacts[0].contactid)
        ) {
            return respondError(res, {
                status: 404,
                code: "WATCHED_CASE_NOT_FOUND",
                message: "Watched case not found"
            });
        }

        const queryUrl =
            "pinswg_watchlists(" + normalisedWatchedCaseID + ")";

        const config = {
            method: "delete",
            url: WEBAPI_URL + queryUrl + hashAPIPath(queryUrl),
            headers: {
                "OData-MaxVersion": "4.0",
                "OData-Version": "4.0",
                Accept: "application/json",
                Prefer: 'odata.include-annotations="*",return=representation',
                Authorization: "Bearer " + token.access_token,
                "Content-Type": "application/json"
            }
        };

        const { data } = await axios(config);
        return respondSuccess(res, data);
    } catch (error) {
        consoleLogger(error);
        return respondError(res, {
            status: 500,
            code: "WATCHED_CASE_DELETE_FAILED",
            message: "Failed to delete watched case"
        });
    }
}